Ventilating-window for roofs.



PATENTED JAN. 27, 1903.

W. DREYER. VENTILATING WINDOW FOR ROOFS.

- APPLICATION FILED NOV. 6, 1902.

N0 MODEL.

Urvrrnn STATES FFICE.

\VILHELM DREYER, OF VVESSELING, NEAR COLOGNE, GERMANY.

VENTILATING-WINDOW FOR ROOFS.

SPECIFICATION forming part of Letters Patent No. 719,203, dated January 27, 1903. Application filed November 6,1902. Serial No. 130,228. (No model.)

To all whom it may concern.-

Be it known that I, WILHELM DREi ER, a subject of the King of Prussia, Emperor of Germany, whose post-office address is Wesseling, near COlOgneOn-the-Rhine, Prussia, German Empire, have invented new and useful Ventilating-Windows for Roofs, of which the following is a specification.

My invention relates to roof-windows adapted to be opened for purposes of ventilation by means of raising and lowering mechanism, and more especially to such which consist of a top frame capable of being lifted in a parallel direction and of one or more intermediate frames which are raised in like manner.

The invention has for its object by avoiding all slots, guide-pieces, and the like to provide by aid of a simple system of levers an easy and convenient means of opening and closing .the window and at the same time the necessary security against wind.

Windows of this description which have the purpose of ventilating and at the same time preventing the ingress of rain, dust, 850., were hitherto raised and lowered by means of va-v rious devicesas, for instance, the so-called Niirnberg shears, which were provided with long slots and guide-pieces in order to obtain a parallel movement, as well as the necessary security against the influence of the wind. These guides and slots are, however, subjected to rust, soon accumulate dirt, a certain objectionable friction being also connected with the same, the said drawbacks necessitating a great expenditure of force to raise the window.

According to my invention two levers are pivotallyfixed to the opposite sides of a rigid light frame, the two levers being connected togetherbymeansofapivotedarm. Fromthe ends of these levers pivoted carrying or supporting arms are connected to the top frame, while between the ends and the pivots of the said levers further carrying or supporting arms are arranged, the same being attached to one or more intermediate frames. The

ends of' two opposite levers pointing inward are lengthened and connected by a cross-piece, to which a chain, a cord, or the like is attached.

The pivots of the joint-piece which connect the facing parts of the levers are not both located in the vertical center line of the window,

the top pivot being laterally arranged with regard to the under one for the purpose of obtaining a greater purchase and to facilitate raising of the frame. The carrying-arms articulately connected with the ends of the le ver are on the one side rigidly connected with the top frame in order to obviate a shaking of the intermediate frame or frames, as Well as to enable the same to better resist the action of the wind.

The top frame may be provided with glass or opaque plates of suitable material;

To enable the invention to be fully understood, I will describe the same with reference to a constructional example shown in the accompanying drawings, of,which- Figure 1 is a vertical section showing the window in closed position, while Fig. 2 represents, also in vertical section, the raised position of the same.

In the drawings, (t represents the light frame secured to the roof.

' b is the top frame, which may, as hereinbefore indicated, be provided with glass or opaque plates. The number of intermediate frames is, however, as hereinbefore indicated, optional.

The levers d and g are pivoted at d and 9 upon the facing sides, the arms or supports 2' and 7t, carrying the top frame I), being articulately connected to the outer ends. The arms h and m are pivotally connected to the top frame b and intermediate frame a, while the arms 71 and Z are rigidly connected to the top frame and intermediate frame by means of bolts 76 and 7c in order to afford greater stability against the action of the wind when the window is open. The said levers d and g are connected by a joint-arm f, the pivots of which are so located with reference to the center line that the most favorable leverage for the raising and lowering movement of the top and intermediate frames is obtained.

The joint-arms land m, carrying the intermediate frames c, are attached at a point between the outer ends and the pivots of the levers d and When several intermediate frames are employed, the number of jointarms must be increased in proportion. The lever of the one side of the lifting devicefor instance, the lever dis lengthened, as shown at e, and the extended arms connected by a cross-piece p, to which a chain a, a rod, or the like is attached, which serves to open and close the window.

If now in the position shown in Fig. 1 the chain it be slightly drawn down, the Window will assume the position shown in Fig. 2, the length of the movement of the lever being, for instance, limited by the levers d striking against a fixed stop or projection 0.

The chain at or other suitable device may be secured at any optional opened or closed position of the window.

What I claim as my invention, and desire to secure by Letters Patent of the United States, is-

1. In a roof-window, the combination of the light frame secured to the roof, the top frame and one or more intermediate frames with a lever system consisting of two pairs of levers of which the ends facing each other are pivotally connected by a joint arm or link, supports or arms connecting the outer ends of the levers with the top frame and like supports connecting a point or points of the levers between their outer ends with one or more intermediate frames, substantially as and for the purpose described.

2. In a roof-window, the combination of the light frame secured to the roof, the top frame and one or more intermediate frames with a lever system consisting of two pairs of levers of which the ends facing each other are connected by a joint arm or link the ends of one pair of the lovers being provided with extended arms connected by a cross-piece, substantially as and for the purpose described.

3. In a roof-window, the combination of the light frame secured to the roof, the top frame and one or more intermediate frames with a lever system consisting of two pairs of levers of which the ends facing each other are pivotally connected by a joint arm or link, supports or arms connecting the outer ends of the levers with the top frame and like supports or arms connecting a point or points intermediate between the ends of the lever with the intermediate frame or frames, the connections between such supports and the said frames being rigid on one side of the window, substantially as and for the purpose described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

WILHELM DREYER.

WVitnesses:

CARL SoHMITT, J on. 801mm. 

